Multifunctional fixator for midline conduit

Abstract

The invention relates to a multifunctional fixator for a midline catheter, and aims to solve the problem of accidental extubation caused by discomfort or unconscious actions of a patient. The fixator comprises a protective cover, a skirt band, a fixing device, a band set, a functional hole, a locking mechanism and an anti-pulling mechanism. The protective cover adopts lightweight design, vent holes are formed in the side wall, and the bottom end in the protective cover is connected with a fixing device. Inclined spring pieces are arranged on two sides of the bottom end of the functional hole, a locking mechanism is arranged at the top end of the hole wall, and anti-pulling mechanisms are arranged on two sides. The locking mechanism automatically adjusts the locking state through mechanical transmission, and the anti-pulling mechanism applies reverse pressure when a patient pulls the catheter to prevent the catheter from falling off. The air holes and the air bags enhance the use comfort of the patient; the design of a transparent observation window and a functional hole improves the convenience of nursing operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical appliances, and particularly to a multifunctional fixator for a midline catheter. Background Art

[0002] Midline catheters are commonly used for parenteral nutrition, IV fluid replacement, and the administration of analgesics and antibiotics. The midline catheter is inserted at the bedside using aseptic technique and can remain in place for several weeks. Insertion (venipuncture) is performed in the cephalic vein, basilic vein, or brachial vein above and below the elbow pit. The catheter tip advances 3 inches to 8 inches, where the tip terminates below the axilla and proximal central vein.

[0003] The potential advantages of midline catheters are reduced frequency of repeated venipuncture for laboratory / restart, reduced incidence of catheter-related infections, extended implant / indwelling duration, improved clinical outcomes, patient satisfaction, and cost savings. Compared with smaller veins, placing the catheter tip in a larger-diameter vein in the upper arm provides improved drug delivery therapy and blood dilution. Midline catheters can be used to infuse infectious agents at higher flow rates, which is typically done with CV catheters such as PICC applications.

[0004] During the maintenance phase after successful midline catheter puncture, because of the long usage time and the persistent discomfort, it is easy to cause the patient to be irritable and uncooperative, or the patient may accidentally pull out the catheter unconsciously while asleep. Re-puncture is required, causing secondary harm to the patient. If not discovered in time, the long-term exposure of the wound may also lead to wound infection. Summary of the Invention

[0005] The present invention aims to provide a multifunctional fixator for a midline catheter to solve the problem that existing patients may accidentally pull out the catheter.

[0006] To achieve the above object, the present invention provides the following technical solution: a multifunctional fixator for a midline catheter, including a protective cover, the bottom end of the protective cover is fixedly connected with a skirt, the bottom end inside the protective cover is fixedly connected with a fixing device, the bottom end of the side wall of the protective cover is fixedly connected with two pairs of belt groups, a function hole is opened at the rear end of the protective cover, the bottom end of the function hole penetrates to the bottom end of the skirt, a locking mechanism is arranged at the top end of the hole wall of the function hole, and a pair of symmetrically arranged anti-pulling mechanisms are arranged on both sides of the hole wall of the function hole. The locking mechanism includes a first pressing block, the rear end of the first pressing block is fixedly connected with a first rack, the first rack meshes with a first spur gear, the first spur gear is connected with a first pulley through a rotating shaft, the first pulley is connected with a second pulley through a transmission belt, the second pulley is connected with a first bevel gear through a rotating shaft, the first bevel gear meshes with a second bevel gear, and the second bevel gear is connected with a second spur gear through a rotating shaft. The anti-pulling mechanism includes a third rack, the third rack is slidably connected with a slider, a fourth spur gear is arranged inside the slider, the fourth spur gear meshes with a third spur gear, a fourth rack meshes with the third rack, the third spur gear meshes with a second rack, the bottom end of the second rack is fixedly connected with a second pressing block, the rear end of the slider is fixedly connected with a fourth rack, and the fourth rack meshes with the second spur gear.

[0007] Preferably, each pair of the belt groups includes two fixing belts, and a hook-and-loop fastener rough surface is arranged at the top end of each of the two fixing belts, and a hook-and-loop fastener hook surface is arranged at the bottom end.

[0008] Preferably, spring pieces inclined from the outside to the inside are fixedly connected to both sides of the bottom end of the function hole.

[0009] Preferably, a plurality of ventilation holes are opened on the side wall of the protective cover.

[0010] Preferably, the fixing device includes an airbag, the airbag is provided with an inflation port, the inflation port penetrates through the protective cover, and a sealing plug is arranged at the free end of the inflation port.

[0011] Preferably, a plurality of holes can be formed after the airbag is inflated.

[0012] Principle and beneficial effects of this technical solution:

[0013] Improve the fixing stability: Through the synergistic effect of the locking mechanism and the anti-pulling mechanism, the midline catheter is firmly locked. Especially when the patient makes unconscious movements or pulls, as the patient pulls, several pressing blocks will clamp the midline catheter tighter, effectively reducing the risk of accidental extubation caused by the patient's discomfort or other reasons, and reducing the secondary injury to the patient.

[0014] Enhance patient comfort during use: The protective cover is designed with lightweight materials. The breathable holes and the breathable design of the airbag reduce skin dampness and stuffiness, lowering the risk of allergies. The soft inner lining and the smooth edge treatment avoid skin irritation, and the Velcro design facilitates adjusting the tightness, further enhancing the patient's usage experience.

[0015] Improve the convenience of nursing operations: The transparent observation window and the functional hole design allow medical staff to perform infusion operations without disassembling the device, simplifying the nursing process and improving operation efficiency. At the same time, the dual options of the airbag and the elastic fixing belt meet the personalized needs of different patients. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a multifunctional fixator for a midline catheter provided by an embodiment of the present invention;

[0017] Figure 2 It is a left side sectional view of a multifunctional fixator for a midline catheter provided by an embodiment of the present invention;

[0018] Figure 3 It is a schematic diagram of the locking mechanism and the anti-pulling mechanism of a multifunctional fixator for a midline catheter provided by an embodiment of the present invention Figure 1 ;

[0019] Figure 4 It is a schematic diagram of the locking mechanism and the anti-pulling mechanism of a multifunctional fixator for a midline catheter provided by an embodiment of the present invention Figure 2 ;

[0020] Figure 5 It is a schematic structural diagram of the anti-pulling mechanism of a multifunctional fixator for a midline catheter provided by an embodiment of the present invention;

[0021] In the figure: 1, protective cover; 2, skirt band; 3, breathable hole; 4, fixing belt; 5, rough surface of Velcro; 6, spring piece; 7, locking mechanism; 71, first extrusion block; 72, first rack; 73, first spur gear; 74, transmission belt; 75, second pulley; 76, first bevel gear; 77, second bevel gear; 78, second spur gear; 8, anti-pulling mechanism; 81, second extrusion block; 82, second rack; 83, third spur gear; 84, fourth spur gear; 85, slider; 86, third rack; 87, fourth rack; 9, airbag. Detailed Embodiments

[0022] The following further details the present invention in conjunction with the drawings and embodiments:

[0023] Embodiment 1:

[0024] As Figures 1 to 5As shown in the figure, a multifunctional fixator for a midline catheter provided by the present invention has a core structure including a protective cover 1, a skirt 2, a fixing device, a belt group, functional holes, a locking mechanism 7, and an anti-pulling mechanism 8. These components work together to provide stable fixation for the midline catheter, while taking into account the comfort of the patient during use and the convenience of operation for medical staff.

[0025] The protective cover 1 of the device is made of medical-grade PP material, which is lightweight and strong; the fixing belt 4 is made of elastic nylon; the magic tape is medical-grade magic tape; all linings are made of anti-allergic medical cotton fabric to increase the comfort of the patient.

[0026] At the bottom end inside the protective cover 1, there is a fixed connection with a fixing device. At the bottom end of the side wall of the protective cover 1, there are two pairs of belt groups fixedly connected. At the rear end of the protective cover 1, there are functional holes. The bottom end of the functional holes penetrates to the bottom end of the skirt 2. At the top end of the hole wall of the functional holes, there is a locking mechanism 7. On both sides of the hole wall of the functional holes, there is a pair of symmetrically arranged anti-pulling mechanisms 8. The locking mechanism 7 includes a first extrusion block 71. At the rear end of the first extrusion block 71, there is a first rack 72 fixedly connected. The first rack 72 meshes with a first spur gear 73. The first spur gear 73 is connected by a rotating shaft to a first pulley. The first pulley is connected by a transmission belt 74 to a second pulley 75. The second pulley 75 is connected by a rotating shaft to a first bevel gear 76. The first bevel gear 76 meshes with a second bevel gear 77. The second bevel gear 77 is connected by a rotating shaft to a second spur gear 78. The anti-pulling mechanism 8 includes a third rack 86. The third rack 86 is slidably connected to a slider 85. Inside the slider 85, there is a fourth spur gear 84. The fourth spur gear 84 meshes with a third spur gear 83. A fourth rack 87 and the third rack 86 mesh. The third spur gear 83 meshes with a second rack 82. At the bottom end of the second rack 82, there is a second extrusion block 81 fixedly connected. At the rear end of the slider 85, there is a fourth rack 87 fixedly connected. The fourth rack 87 meshes with the second spur gear 78.

[0027] During the actual use process, first, the midline catheter is punctured into the patient's body. After successful puncture, medical staff use medical tape to simply fix the exposed part of the midline catheter to prevent accidental movement of the catheter during subsequent operations. Subsequently, the protective cover 1 is placed over the midline catheter to ensure that the main part of the midline catheter is completely covered by the protective cover 1, providing a preliminary protection effect. At this time, the end of the midline catheter is inserted into the functional holes from below the functional holes. This design allows for direct connection to the midline catheter when performing infusion operations without having to remove the entire fixing device, greatly improving the operation efficiency of medical staff and reducing the risk of accidental movement of the catheter caused by frequent disassembly of the device. The skirt 2 is a relatively weak rubber band. Since the protective cover 1 is made of a relatively hard material, the design of the skirt 2 can ensure adaptation to the muscle shapes of different patients.

[0028] When medical staff insert the midline catheter into the functional hole, the midline catheter will push the first extrusion block 71, causing it to move backward. Since the first extrusion block 71 is fixedly connected to the first rack 72, the first rack 72 will move backward accordingly. The first rack 72 meshes with the first spur gear 73, so the first spur gear 73 will also rotate accordingly. The first spur gear 73 is connected to the first pulley through a rotating shaft, and the first pulley is connected to the second pulley 75 through a transmission belt 74, thereby driving the second pulley 75 to rotate. The second pulley 75 is connected to the first bevel gear 76 through a rotating shaft, further driving the first bevel gear 76 to rotate. The first bevel gear 76 meshes with the second bevel gear 77, causing the second bevel gear 77 to also rotate. The second bevel gear 77 is connected to the second spur gear 78 through a rotating shaft, finally driving the second spur gear 78 to rotate. The fourth rack 87 is fixed on the slider 85, and the rotation will cause the slider 85 to move. The third rack 86 is fixedly connected inside the device, and the movement of the slider 85 will drive the fourth spur gear 84 inside it to rotate, thereby driving the third spur gear 83 to rotate, and finally driving the second rack 82 to drive the second extrusion block 81 to move downward. This series of mechanical transmission processes enable the locking mechanism 7 to automatically adjust its locking state according to the insertion depth of the midline catheter, ensuring that midline catheters of any diameter can be firmly locked in the functional hole.

[0029] When the patient exerts a pulling force on the midline catheter due to discomfort or other reasons, a frictional force will be generated between the midline catheter and the second extrusion block 81. Since the pulling of the midline catheter will drive the second extrusion block 81 to be pulled together, that is, drive the slider 85 to move forward together, the movement of the slider 85 will drive the second rack 82 to drive the second extrusion block 81 to move downward, further preventing the midline catheter from being pulled out of the patient's body. This automatic anti-pulling mechanism effectively reduces the risk of accidental catheter removal caused by the patient's unconscious movements and improves the safety of use.

[0030] The airbag 9 is provided with an inflation port, the inflation port penetrates through the protective cover 1, and a sealing plug is provided at the free end. During use, medical staff inflate the inside of the airbag 9 from the inflation port until the patient feels a certain sense of extrusion. At this time, after the airbag 9 is inflated, it can closely adhere to the midline catheter inlet to ensure its core stability. In addition, after the airbag 9 is inflated, it can also form several holes, which not only help to further fix the midline catheter, but also increase the air permeability between the airbag 9 and the skin to a certain extent, reducing the discomfort of the patient during long-term wearing.

[0031] To further enhance the stability of the fixator, two pairs of belt groups are fixedly connected to the bottom end of the side wall of the protective cover 1. Each pair of belt groups includes two fixing belts 4, and the two fixing belts 4 are respectively provided with a rough surface of Velcro 5 at the top end and a hook surface of Velcro at the bottom end. Medical staff can flexibly adjust the tightness of the fixing belts 4 according to the thickness of the patient's arm to ensure that the protective cover 1 can be firmly fixed on the patient's arm. This Velcro design is not only convenient for adjustment, but also convenient for medical staff to quickly disassemble and assemble, improving the convenience of nursing operations.

[0032] The side wall of the protective cover 1 is also provided with a plurality of ventilation holes 3. The design of the ventilation holes 3 ensures the air circulation between the inside and outside of the protective cover 1, avoiding problems such as the patient's skin becoming damp and stuffy due to long-term wearing, and improving the comfort of the patient during use. At the same time, the protective cover 1 adopts an arc design, which is not only beautiful but also not easy to collide. A transparent observation window is provided at its top, which is convenient for medical staff to monitor the state of the midline catheter at any time and ensure the safety and reliability during use.

[0033] On both side walls at the bottom end of the functional hole, there are also fixedly connected spring pieces 6 that are inclined from outside to inside. The design of these spring pieces 6 is similar but opposite, further enhancing the fixing effect of the functional hole on the midline catheter. When medical staff insert the midline catheter into the functional hole, the spring pieces 6 will automatically open to allow the midline catheter to enter smoothly. After the midline catheter is completely inserted, the spring pieces 6 will automatically rebound to prevent the midline catheter from falling out, playing an auxiliary fixing role.

[0034] Embodiment 2:

[0035] In practical applications, although the airbag 9 fixing device performs well in terms of stability, in some cases, the airbag 9 may have an unsatisfactory air permeability problem. To solve this problem, this embodiment provides an alternative solution for the fixing device, that is, using an elastic fixing belt 4 instead of the airbag 9.

[0036] In this alternative solution, the design of the fixing belt 4 is combined with the structure of the protective cover 1, so that when the protective cover 1 covers the midline catheter, the fixing belt 4 can automatically adapt to the shape of the patient's arm and perform fixation. This elastic fixing belt 4 has good flexibility and elasticity, can closely fit the contour of the patient's arm, and at the same time applies an appropriate fixing force to the midline catheter. Compared with the airbag 9 fixing device, the elastic fixing belt 4 has obvious advantages in terms of air permeability and can effectively reduce the discomfort of the patient during long-term wearing.

[0037] In addition, the use of the elastic fixing belt 4 also simplifies the structure of the fixing device and reduces the production cost. In actual operation, medical staff only need to cover the protective cover 1 above the midline catheter, and the elastic fixing belt 4 will automatically fix the midline catheter without the need for inflation operation. This simplified design not only improves the operation efficiency of medical staff but also reduces problems such as insecure fixation caused by improper operation.

[0038] Although the elastic fixing band 4 performs excellently in terms of breathability, since it cannot adapt to the thickness of the arms of different patients and can only provide one kind of elasticity, it will cause a feeling of excessive squeezing for some patients with thicker arms, and may not be fixed enough for patients with thinner arms. That is, in terms of fixing stability, it may be slightly inferior to the airbag 9 fixing device. Therefore, when choosing a fixing device, medical staff need to make a balance according to the specific situation and actual needs of the patients. For patients who need to wear for a long time and have a high requirement for breathability, the elastic fixing band 4 may be a better choice; while for patients who need more stable fixing, the airbag 9 fixing device has more advantages.

[0039] The above are only embodiments of the present invention, and common general technical solutions or characteristics in the solutions are not described in detail here. For those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners in the specification and the like can be used to interpret the content of the claims.

Claims

1. A multifunctional fixator for a midline catheter, characterized in that: It includes a protective cover (1), a skirt (2) is fixedly connected to the bottom end of the protective cover (1), a fixing device is fixedly connected to the inner bottom end of the protective cover (1), two pairs of belt groups are fixedly connected to the bottom end of the side wall of the protective cover (1), a functional hole is opened at the rear end of the protective cover (1), the bottom end of the functional hole penetrates to the bottom end of the skirt (2), a locking mechanism (7) is arranged at the top end of the hole wall of the functional hole, and a pair of symmetrically arranged anti-pulling mechanisms (8) are arranged on both sides of the hole wall of the functional hole. The locking mechanism (7) includes a first extrusion block (71), a first rack (72) is fixedly connected to the rear end of the first extrusion block (71), the first rack (72) meshes with a first spur gear (73), the first spur gear (73) is connected to a first pulley through a rotating shaft, the first pulley is connected to a second pulley (75) through a transmission belt (74), the second pulley (75) is connected to a first bevel gear (76) through a rotating shaft, the first bevel gear (76) meshes with a second bevel gear (77), the second bevel gear (77) is connected to a second spur gear (78) through a rotating shaft. The anti-pulling mechanism (8) includes a third rack (86), the third rack (86) is slidably connected to a slider (85), a fourth spur gear (84) is arranged in the slider (85), the fourth spur gear (84) meshes with a third spur gear (83), a fourth rack (87) meshes with the third rack (86), the third spur gear (83) meshes with a second rack (82), a second extrusion block (81) is fixedly connected to the bottom end of the second rack (82), a fourth rack (87) is fixedly connected to the rear end of the slider (85), and the fourth rack (87) meshes with the second spur gear (78).

2. The multifunctional fixator for a midline catheter according to claim 1, wherein: Each pair of the belt groups includes two fixing belts (4), a hook-and-loop fastener rough surface (5) is arranged at the top end of each of the two fixing belts (4), and a hook-and-loop fastener hook surface is arranged at the bottom end of each of the two fixing belts (4).

3. The multifunctional fixator for a midline catheter according to claim 1, characterized in that: Spring pieces (6) inclined from the outside to the inside are fixedly connected to both sides of the bottom end of the hole wall of the functional hole.

4. The multifunctional fixator for a midline catheter according to claim 1, characterized in that: A plurality of ventilation holes (3) are opened on the side wall of the protective cover (1).

5. The multifunctional fixator for a midline catheter according to claim 1, characterized in that: The fixing device includes an airbag (9), the airbag (9) is provided with an inflation port, the inflation port penetrates through the protective cover (1), and a sealing plug is arranged at the free end of the inflation port.

6. The multifunctional fixator for a midline catheter according to claim 5, characterized in that: A plurality of holes can be formed after the airbag (9) is inflated.

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